diff --git a/packages/modern-di/modern_di/container.py b/packages/modern-di/modern_di/container.py
index 951a3d4..64a5703 100644
--- a/packages/modern-di/modern_di/container.py
+++ b/packages/modern-di/modern_di/container.py
@@ -111,7 +111,7 @@ def override(
         mock: typing.Any,  # noqa: ANN401
     ) -> None:
         self.cache_registry.clear_kwargs()
-        new_provider = mock if isinstance(mock, AbstractProvider) else Object(obj=mock)
+        new_provider = mock if isinstance(mock, AbstractProvider) else Object(obj=mock, bound_type=dependency_type)
         return self.providers_registry.override_provider(
             dependency_name=dependency_name, dependency_type=dependency_type, new_provider=new_provider
         )
diff --git a/packages/modern-di/modern_di/types_parser.py b/packages/modern-di/modern_di/types_parser.py
index aa2d069..c3c9d60 100644
--- a/packages/modern-di/modern_di/types_parser.py
+++ b/packages/modern-di/modern_di/types_parser.py
@@ -18,6 +18,9 @@ def from_type(cls, type_: type, default: object = UNSET) -> "SignatureItem":
         if type_ is types.NoneType:
             return cls()
 
+        if isinstance(type_, typing._AnnotatedAlias):  # type: ignore[attr-defined]  # noqa: SLF001
+            type_ = type_.__args__[0]
+
         result: dict[str, typing.Any] = {"default": default}
         if isinstance(type_, types.GenericAlias):
             result["arg_type"] = type_.__origin__
diff --git a/packages/modern-di/tests_core/test_types_parser.py b/packages/modern-di/tests_core/test_types_parser.py
index 3fb9b6e..5c3d56e 100644
--- a/packages/modern-di/tests_core/test_types_parser.py
+++ b/packages/modern-di/tests_core/test_types_parser.py
@@ -9,11 +9,13 @@
     ("type_", "result"),
     [
         (int, SignatureItem(arg_type=int)),
+        (typing.Annotated[int, None], SignatureItem(arg_type=int)),
         (list[int], SignatureItem(arg_type=list, args=[int])),
         (dict[str, typing.Any], SignatureItem(arg_type=dict, args=[str, typing.Any])),
         (typing.Optional[str], SignatureItem(arg_type=str, is_nullable=True)),  # noqa: UP045
         (str | None, SignatureItem(arg_type=str, is_nullable=True)),
         (str | int, SignatureItem(args=[str, int])),
+        (typing.Union[str | int], SignatureItem(args=[str, int])),  # noqa: UP007
         (list[str] | None, SignatureItem(arg_type=list, is_nullable=True)),
     ],
 )
@@ -22,7 +24,7 @@ def test_signature_item_parser(type_: type, result: SignatureItem) -> None:
 
 
 def simple_func(arg1: int, arg2: str | None = None) -> int: ...  # type: ignore[empty-body]
-def none_func(arg1: int, arg2: str | None = None) -> None: ...
+def none_func(arg1: typing.Annotated[int, None], arg2: str | None = None) -> None: ...
 def args_kwargs_func(*args: int, **kwargs: str) -> None: ...
 def func_with_str_annotations(arg1: "list[int]", arg2: "str") -> None: ...
 async def async_func(arg1: int = 1, arg2="str") -> int: ...  # type: ignore[no-untyped-def,empty-body]  # noqa: ANN001